21.73% is the change from 451 to 549
Calculation steps:
[( 549 - 451 ) ÷ 451] x 100 = 21.73%
Formula
Percentage change = [(549 - 451) / 451] x 100
Subtract the new number by the original number
549 - 451 = 98
98 ÷ 451 = 0.21729490022172948
0.21729490022172948 x 100 = 21.73%